If the vitamin is exposed to too much light, it can be deactivated from its usable form. The PRI during pregnancy is 1.9 mg/day and the PRI for lactating females is 2.0 mg/day. For children aged 1–14 years the PRIs increase with age from 0.6 to 1.4 mg/day. { Riboflavin deficiency appears to impair the metabolism of the […]